i'm getting a CrashIfClientProvidedBogusAudioBufferList exception when attempting once my
AudioConverterFillComplexBuffer callback returns. What are the possibile reasons why this exception would be ...

I am trying to take a video file read it in using AVAssetReader and pass the audio off to CoreAudio for processing (adding effects and stuff) before saving it back out to disk using AVAssetWriter. I ...

This question is little abstract.
I have some raw audio data coming from some source in the form of C float **array. I want to convert that data to kAudioFormatMPEG4AAC format. I am totally unaware ...

What's the best way to look up the meaning of OSStatus errors ( i.e. -43 ) in Core Audio? Is there a way to process them in your iOS code so they can be formatted to show up with a brief explanation ...

I'm trying to figure out how to correcty schedule an audiofile in the near future. My actual goal is to play multiple tracks synchonized.
So how to configure 'aTime' correctly so it starts in about ...

I'm trying to connect a performance parameter to control the amplifier gain of an AUSampler in AU Lab but I'm unable to save the parameter. When I click to another tab I get a message that says:
You ...

I'm trying out the code in this example and basically I want to limit the number of samples that are played.
Right now once you hit the play button the app plays a tone at the frequency that was set ...

Recently someone contacted me about an iPad metronome that had some fairly subtle problems with timing. I've worked with a number of OS X applications that did not have problems with timing- they were ...

This post is also posted on The Amazing Audio Engine forum: http://forum.theamazingaudioengine.com/discussion/883/using-offline-rendering-to-determine-bpm-of-a-track#latest
Hi everyone, I am new to ...

I have successfully loaded SoundFont (.sf2) files in an AUSampler in my IOS app but any programmed reverb is missing. The SF2s contain parameter data for things like pan, envelope and filter cut-off ...

I'd like to get notified when headphones are plugged in or out in the headphone jack.
I've searched around for this on stackoverflow but I can't seem to find what I'm looking for for the Mac, I can ...

I'm using two third party tools in my project. One is "The Amazing Audio Engine". I use this for audio filters. The other is GPUImage, or more specifically, GPUImageMovieWriter. When I record videos, ...

I use Audio Queue Services to record PCM audio data on Mac OS X. It works but the number of frames I get in my callback varies.
static void MyAQInputCallback(void *inUserData, AudioQueueRef inQueue, ...

I'm working on a synthesizer that incorporates an EQ section, and would like to know if anyone has a recommendation about the order that the Audiounits are chained together.
Currently my graph looks ...

We have an audio application for Mac OSX which is music player with some audio effects . Ever since we upgraded to mavericks(10.9) we are finding one weird issue i.e when we get call from facetime our ...

I have an app that uses .aupreset files along with .wav samples to define instruments that are loaded into an AUSampler audio unit.
The .aupreset files reference the .wav files with absolute paths. As ...

I am trying to detect beat, pitch, onset, and fast Fourier Transform (FFT) of audio file in iOS and I found that aubio provides these features and iOS framework also available.
So far, I am using The ...

I have to generate the audio for many isolated notes, chords and melodies using a sampled instrument. What would be the easiest way to programmatically do so (I don't want to manually enter the notes ...

I am making a music app where you can add new instruments to an existing sequencer. These instruments are separate AudioUnitSamplers stored in an array so when a new instrument and track is loaded, It ...